Abstract:
:The cytotoxicity of sodium nitroprusside (SNP) to the human endothelial cell line, ECV304, was studied. The cytotoxicity of SNP was primarily related to the liberation of nitric oxide (NO). S-nitroso-N-acetyl-d-penicillamine (SNAP), an NO donor, was highly toxic. Other degradation products of SNP either exerted much less toxicity (i.e. cyanide and nitrite) or were non-toxic (i.e. ferricyanide and ferrocyanide). SNP induced multinucleation, inhibited cell proliferation, lowered the endogenous level of reduced glutathione (GSH), and induced apoptotic cell death. The plasma membrane was not the prime site of toxic action, as leakage of lactic acid dehydrogenase (LDH) occurred only at a relatively high concentration of SNP. Cells treated with non-toxic levels of the glutathione-depleting agents, 1-chloro-2,4-dinitrobenzene (CDNB), dl-buthionine-[S,R]-sulfoximine (BSO), and 1,3-bis-(chloroethyl)-1-nitrosourea (BCNU), were hypersensitive to subsequent exposure to SNP. The GSH status of the cells was, therefore, a key factor in determining the cytotoxicity of SNP.
journal_name
Environ Toxicol Pharmacoljournal_title
Environmental toxicology and pharmacologyauthors
Babich H,Zuckerbraun HL,Ricklis AS,Blau Ldoi
10.1016/s1382-6689(97)10071-0subject
Has Abstractpub_date
1998-03-01 00:00:00pages
135-44issue
2eissn
1382-6689issn
1872-7077pii
S1382-6689(97)10071-0journal_volume
5pub_type
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